A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

This claimant to the title of "smallest church in the 48 states" doubles as an equally tiny, quasi-post office.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

This university transit system is a 1970's vision of the future.

This abandoned school has had many lives since the early 1900s, and all of them doomed.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

The world's largest fully steerable radio telescope.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Smack in the midst of coal country, this collection provides a peoples' history of Appalachian miners' heritage.

This abandoned amusement park was built on a site with a dark history.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

An abandoned 1920s school with a mysterious history.